API's that are part of Google Analytics

Tracking Code API

This is a JavaScript Library that can be used by website developers/webmasters to track site activity sending user click path to the tool data pool.

http://code.google.com/apis/analytics/docs/tracking/home.html

Management API

REST API. Can be used to retrieve all management information on Google Analytics: Users, Profiles, Goals, Filters, etc.

http://code.google.com/apis/analytics/docs/mgmt/home.html

Data Export API

REST API. Can be used to retrieve all data that is present on the Google Analytics Interface. It's a read-only API.

http://code.google.com/apis/analytics/docs/gdata/home.html

Tools

Google provide some playground-like tools to let you play and learn the APIs

• OAuth Playground
• OAuth2 Playground
• Google Analytics API Explorer